US7433409B2 - Apparatus and method of multiple decoding - Google Patents
Apparatus and method of multiple decoding Download PDFInfo
- Publication number
- US7433409B2 US7433409B2 US09/900,168 US90016801A US7433409B2 US 7433409 B2 US7433409 B2 US 7433409B2 US 90016801 A US90016801 A US 90016801A US 7433409 B2 US7433409 B2 US 7433409B2
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- 238000000034 method Methods 0.000 title claims description 26
- 239000000872 buffer Substances 0.000 claims abstract description 260
- 238000012546 transfer Methods 0.000 claims abstract description 25
- 238000012545 processing Methods 0.000 claims description 23
- 239000000284 extract Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013075 data extraction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4347—Demultiplexing of several video streams
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/24—Systems for the transmission of television signals using pulse code modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/14—Channel dividing arrangements, i.e. in which a single bit stream is divided between several baseband channels and reassembled at the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
- H04N21/42615—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific demultiplexing arrangements
Definitions
- the present invention relates generally to an apparatus and a method of multiple decoding, and more specifically, to apparatuses and methods of reproducing a plurality of data designated from one MPEG (Moving Picture Experts Group) transport stream composed of a plurality of encoded data.
- MPEG Motion Picture Experts Group
- a broadcasting station can transmit a plurality of video and audio data.
- a receiver it is possible to receive the plurality of video and audio data, and selectively display by video and output by audio any of the data. That is, a user can select and view any one of a plurality of video and audio transmitted by the broadcasting station.
- a conventional decoder used in such a receiver will be described with reference to FIGS. 7 to 9 .
- FIG. 7 is a block diagram showing the configuration of a conventional decoding apparatus.
- FIG. 8 is a diagram showing a specific example in which data representing video and audio and other data are multiplexed on an MPEG transport stream.
- FIG. 9 is a flow chart for explaining processing performed by the conventional decoding apparatus.
- the MPEG transport stream is a stream data string in a data format defined in the ISO/IEC13818-1 standard for data transmission and receiving, and is composed of units called packets.
- data representing a plurality of video and audio and other data are respectively stored in payload portions of the packets, and the packets are then multiplexed, to compose an MPEG transport stream ( FIG. 8 ) for transmission toward a receiver.
- the receiver it is possible to judge a header portion of each of the packets composing the MPEG transport stream, to selectively obtain the data representing video and audio and other data.
- the conventional decoding apparatus receives the MPEG transport stream including encoded data representing a plurality of video and audio.
- a method of selecting the inputted MPEG transport stream is not required in describing the background art. Further, modulation and demodulation control is performed depending on a satellite, a cable, and a ground wave and hence, the description thereof is omitted herein. Consequently, the following description will be made using as a premise a state where the corresponding MPEG transport stream has already been selected.
- the conventional decoding apparatus comprises a data extractor 701 , a buffer 702 , a decoder 703 , a buffer manager 704 , a decoding controller 705 , and a reproduction controller 706 .
- the reproduction controller 706 instructs the decoding controller 705 to start decoding (step S 901 ).
- the decoding controller 705 which has received the instruction instructs the decoder 703 to start decoding (step S 902 ), and instructs the buffer manager 704 to start data input to the buffer 702 (step S 903 ).
- the reproduction controller 706 then instructs the data extractor 701 to extract a packet having desired header information from the inputted MPEG transport stream ( FIG. 8 ), the packet having “Header 1 ” in its header portion in this example (step S 904 ).
- the input of the MPEG transport stream externally supplied to the data extractor 701 is started (step S 905 ).
- the data extractor 701 sequentially extracts the packets each having “Header 1 ” designated from the MPEG transport stream, and stores in the buffer 702 the data stored in the payload portions of the extracted packets (step S 906 ).
- the decoder 703 obtains the data stored in the buffer 702 , and sequentially performs the decoding (step S 907 ).
- the decoder 703 confirms whether or not the decoded data, corresponding to a predetermined unit to be outputted, is ready for output (step S 908 ).
- the predetermined unit to be outputted is a frame in the case of video data, for example.
- the decoder 703 continues the decoding of the subsequent data (steps S 905 to S 907 ) to wait for data.
- the decoder 703 outputs the decoded data in the predetermined unit (step S 909 ).
- an object of the present invention is to provide an apparatus and a method of multiple decoding, which makes it possible to simultaneously decode a plurality of encoded data, and to recover the decoding when an error occurred in certain decoding.
- the present invention has the following features to solve the problem above.
- a first aspect of the present invention is directed to a multiple decoding apparatus receiving a signal composed of a plurality of encoded data for simultaneously decoding two or more of the data, and the multiple decoding apparatus includes:
- a reproduction controller for outputting various types of control information related to decoding and reproduction of the data
- a data extractor receiving the signal for extracting the two or more data designated by the control information
- a buffer manager for controlling the buffer in accordance with the control information for the buffer
- a data flow controller for distributing the data stored in the buffer for each type and transferring the data in accordance with provided transfer conditions
- a separate buffer manager for respectively controlling the separate buffers in accordance with information related to the specification of the separate buffer
- a decoding controller for selecting the separate buffer and the decoder which are used for the decoding in accordance with the control information, and outputting information related to the selected separate buffer, the transfer conditions based on the selected separate buffer, and an instruction to start the decoding, respectively, to the separate buffer manager, the data flow controller, and the selected decoder.
- the first aspect even when a single signal composed of a plurality of encoded data, for example, one MPEG transport stream is inputted, desired ones of the plurality of data can be simultaneously decoded.
- the buffer manager outputs, when the buffer becomes full of the data, an overflow notification to the reproduction controller,
- the reproduction controller outputs, upon receipt of the overflow notification, an instruction to stop the data extraction to the data extractor, and outputs an initialization instruction to the decoding controller;
- the decoding controller outputs, upon receipt of the initialization instruction from the reproduction controller, an instruction to initialize all the plurality of separate buffers to the separate buffer manager, outputs to the buffer manager an instruction to initialize the buffer, and respectively outputs instructions to stop the decoding to all the plurality of decoders,
- the buffer manager initializes the buffer in accordance with the initialization instruction from the decoding controller
- the separate buffer manager initializes all the plurality of separate buffers in accordance with the initialization instruction from the decoding controller
- the separate buffer manager outputs, when the specific separate buffer becomes full of the data, an overflow notification that the specific separate buffer overflows to the decoding controller,
- the decoding controller outputs, upon receipt of the overflow notification that the specific separate buffer overflows, an instruction to stop the data transfer to the specific separate buffer to the data flow controller, outputs an instruction to stop the decoding to the decoder corresponding to the specific separate buffer, and outputs to the separate buffer manager an instruction to initialize the specific separate buffer,
- the separate buffer manager initializes the specific separate buffer in accordance with the initialization instruction from the decoding controller
- the separate buffer manager outputs, when the specific separate buffer becomes full of the data, an overflow notification that the specific separate buffer overflows to the decoding controller,
- the decoding controller outputs, upon receipt of the overflow notification that the specific separate buffer overflows, an instruction to discard the data directed toward the specific separate buffer to the data flow controller, outputs an instruction to stop the decoding to the decoder corresponding to the specific separate buffer, and outputs to the separate buffer manager an instruction to initialize the specific separate buffer,
- the separate buffer manager initializes the specific separate buffer in accordance with the initialization instruction from the decoding controller
- a second aspect of the present invention is directed to a multiple decoding method, in which a signal composed of a plurality of encoded data is inputted, to simultaneously decode two or more of the data, comprising the steps of:
- the method further includes, when the buffer becomes full of the data, the steps of
- the method further includes, when the specific separate buffer becomes full of the data, the steps of
- the method further includes, when the specific separate buffer becomes full of the data, the steps of
- FIG. 1 is a block diagram showing the configuration of a multiple decoding apparatus according to an embodiment of the present invention
- FIGS. 2 and 3 are flow charts showing the procedure for processing performed by the multiple decoding apparatus according to the embodiment of the present invention.
- FIG. 4 is a flow chart showing the procedure for processing in a case where a buffer 120 overflows
- FIGS. 5 and 6 are flow charts showing the procedure for processing in a case where a separate buffer 14 i overflows
- FIG. 7 is a block diagram showing the configuration of a conventional decoding apparatus
- FIG. 8 is a diagram for explaining an MPEG transport stream.
- FIG. 9 is a flow chart showing the procedure for processing performed by the conventional decoding apparatus.
- FIG. 1 is a block diagram showing the configuration of a multiple decoding apparatus according to an embodiment of the present invention.
- FIGS. 2 to 6 are flow charts for explaining the procedure for processing in a multiple decoding method respectively carried out by the multiple decoding apparatus according to the present embodiment.
- the multiple decoding apparatus comprises a data extractor 110 , a buffer 120 , a data flow controller 130 , n (n is an arbitrary integer) separate buffers 141 to 14 n , n decoders 151 to 15 n , a buffer manager 160 , a separate buffer manager 170 , a decoding controller 180 , and a reproduction controller 190 .
- the data extractor 110 outputs data which coincides with conditions set from inputted data.
- the buffer 120 temporarily stores the data extracted by the data extractor 110 .
- the data flow controller 130 respectively transfers the data inputted from the buffer 120 to the separate buffers 141 to 14 n in accordance with the set conditions.
- the separate buffers 141 to 14 n are prepared for the decoders 151 to 15 n , to store the data transferred from the data flow controller 130 .
- the decoders 151 to 15 n respectively decode the data stored in the separate buffers 141 to 14 n .
- the buffer manager 160 manages the buffer 120 .
- the separate buffer manager 170 respectively manages the separate buffers 141 to 14 n .
- the decoding controller 180 respectively controls the decoding performed by the decoders 151 to 15 n .
- the reproduction controller 190 provides an instruction to select, out of the data inputted to the data extractor 110 , the data to be decoded and reproduce the selected data.
- the reproduction controller 190 outputs a decoding start instruction to the decoding controller 180 in order to reproduce the data stored in the three packets (step S 201 ).
- the decoding controller 180 which has received the instruction selects, out of the decoders 151 to 15 n , the three arbitrary decoders, which are not used at that time.
- the decoders 151 to 153 shall be selected (steps S 202 and S 203 ).
- the decoding may be caused to wait until the all required number of decoders can be selected, or, if any decoder can be selected, the decoding in the selected decoders may be performed in advance.
- the decoding controller 180 respectively instructs the selected three decoders 151 to 153 to start the decoding (step S 204 ). Further, the decoding controller 180 outputs, in order to respectively issue data input start instructions to the separate buffers 141 to 143 connected to the selected decoders 151 to 153 , an instruction to start data input to the separate buffer manager 170 (step S 205 ).
- the decoding controller 180 then sets in the data flow controller 130 conditions for transferring the data stored in the packet having “Header 1 ”, the data stored in the packet having “Header 2 ”, and the data stored in the packet having “Header 3 ”, respectively, to the separate buffer 141 , the separate buffer 142 , and the separate buffer 143 (step S 206 ).
- the data flow controller 130 starts the transfer of the data stored in the buffer 120 to each of the separate buffers 141 to 143 on the basis of the conditions set by the decoding controller 180 (step S 207 ).
- the decoding controller 180 then instructs the buffer manager 160 to start data input to the buffer 120 (step S 208 ).
- the reproduction controller 190 instructs the data extractor 110 to extract the packets respectively having “Header 1 ”, “Header 2 ” and “Header 3 ” in their header portions (step S 209 ). Consequently, the input of the MPEG transport stream externally supplied to the data extractor 110 is started (step S 210 ).
- the buffer manager 160 checks, when the data stored in the payload portions of the packets are stored in the buffer 120 , whether or not the buffer 120 overflows (step S 301 ).
- the decoding performed in the following manner differs depending on the presence or absence of the overflow of the buffer 120 .
- the data extractor 110 stores the extracted data in the buffer 120 (step S 303 ).
- the data read out is the data stored in the packet having “Header 1 ”, for example, the separate buffer 141 , which is the destination of transfer of the data, is specified.
- the buffer manager 160 notifies the reproduction controller 190 that the buffer 120 overflows (step S 401 ).
- the reproduction controller 190 which has been notified instructs the data extractor 110 to stop the data extraction (step S 402 ), and then instructs the decoding controller 180 to stop the decoding by all the decoders (step S 403 ).
- the decoding controller 180 instructs the data flow controller 130 to stop the data transfer to all the separate buffers 141 to 14 n (step S 404 ), and instructs the buffer manager 160 to initialize the buffer 120 (step S 405 ).
- the decoding controller 180 which has received the instruction issues an instruction to stop the decoding by all the decoders 151 to 15 n (step S 406 ), and then instructs the separate buffer manager 170 to initialize all the separate buffers 141 to 14 n (step S 407 ).
- step S 201 the processing from the step in which the decoding start instruction is outputted from the reproduction controller 190 (step S 201 ) to the step in which the separate buffer 14 i is specified (step S 305 ) is performed again.
- the separate buffer manager 170 checks, when the data flow controller 130 stores in the specified separate buffer 14 i the data read out of the buffer 120 , whether or not the separate buffer 14 i overflows (step S 306 ).
- the decoding differs, as described below, depending on the presence or absence of the overflow of the separate buffer 14 i.
- the data flow controller 130 stores the read data in the separate buffer 14 i (step S 308 ).
- the decoder 15 i decodes the data, when the data is stored in the separate buffer 14 i (step S 309 ).
- the decoder 15 i checks whether or not the decoded data, corresponding to a predetermined unit to be outputted, are ready for output (step S 310 ). When the decoded data are not ready for output, the decoder 15 i enters a stand-by state until the subsequent data arrives. When the decoded data are ready for output, the decoder 15 i outputs the decoded data in the predetermined unit (step S 311 ).
- the decoded data may be outputted as they are.
- the separate buffer manager 170 notifies the decoding controller 180 that the separate buffer 14 i overflows (step S 501 ).
- the decoding controller 180 which has been notified instructs the data flow controller 130 to stop the data transfer from the buffer 120 to the separate buffer 14 i (step S 502 ).
- the data flow controller 130 which has received the instruction stops the data transfer from the buffer 120 to the separate buffer 14 i (step S 503 ). During the stop, the data outputted from the data extractor 110 are stored in the buffer 120 .
- the data continues to be stored in the buffer 120 in a time period elapsed from the time when the data transfer by the data flow controller 130 is stopped until the data transfer is resumed. Accordingly, the size S1(bit) of the buffer 120 must be determined so as to satisfy the following relational expression: S 1 >S 2+RATE* T
- RATE(bit/sec) is the transfer rate of the data received from the data extractor 110 by the buffer 120
- S2(bit) is the size of the data stored in the buffer 120 the moment the data flow controller 130 transfers the data
- T(sec) is a time period elapsed from the time when the data transfer by the data flow controller 130 is stopped until the data transfer is resumed.
- the decoding controller 180 then instructs the decoder 15 i to stop the decoding (step S 504 ), and further instructs the separate buffer manager 170 to initialize the separate buffer 14 i (step S 505 ).
- the separate buffer manager 170 which has received the instruction initializes the separate buffer 14 i (step S 506 ).
- the decoding controller 180 instructs the decoder 15 i to start the decoding again (step S 507 ), and instructs the separate buffer manager 170 to start data input to the separate buffer 14 i (step S 508 ).
- the decoding controller 180 instructs the data flow controller 130 to resume the data transfer (step S 509 ), so that the data transfer from the buffer 120 to the separate buffer 14 i is resumed.
- the separate buffer manager 170 notifies the decoding controller 180 that the separate buffer 14 i overflows (step S 601 ).
- the decoding controller 180 which has been notified instructs the data flow controller 130 to discard the data read out of the buffer 120 to the separate buffer 14 i (step S 602 ).
- the data flow controller 130 which has received the instruction discards the corresponding data (step S 603 ).
- the decoding controller 180 then instructs the decoder 15 i to stop the decoding (step S 604 ), and instructs the separate buffer manager 170 to initialize the separate buffer manager 14 i (step S 605 ).
- the separate buffer manager 170 which has received the instruction initializes the separate buffer 14 i (step S 606 ).
- the decoding controller 180 instructs the decoder 15 i to resume the decoding (step S 607 ), and instructs the separate buffer manager 170 to resume the data input to the separate buffer 14 i from the buffer 120 (step S 608 ).
- the decoding controller 180 then outputs to the data flow controller 130 an instruction to resume the data transfer of the corresponding data to the separate buffer 14 i (step S 609 ).
- the subsequent data input processing is performed upon recovering the separate buffer 14 i which overflows after the data is discarded in the data flow controller 130 , the subsequent data input processing may be performed asynchronously with overflow recovery processing after the data is discarded.
- a plurality of encoded data can be simultaneously decoded. Further, even when the buffer 120 or the separate buffers 141 to 14 n overflow due to the occurrence of any error, it is feasible to recover unsuccessful decoding due to the error.
- the signal to be inputted may be another signal, provided that it has identification information for identifying a plurality of data and has such a format that the plurality of data are mixed (frequency-division multiplexed, time-division multiplexed, for example).
Abstract
Description
S1>S2+RATE*T
Claims (4)
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EP (1) | EP1182887A3 (en) |
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AU (1) | AU771855B2 (en) |
Cited By (1)
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US20080215343A1 (en) * | 2007-03-01 | 2008-09-04 | Hiroyuki Goto | Audio decoding apparatus and audio decoding system |
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JP3565182B2 (en) * | 2001-05-11 | 2004-09-15 | 日本電気株式会社 | Method and method for preventing input of variable length code from being interrupted |
US7462425B2 (en) | 2003-09-26 | 2008-12-09 | Kabushiki Kaisha Toshiba | Nonaqueous electrolyte secondary battery and battery module |
US7707039B2 (en) * | 2004-02-15 | 2010-04-27 | Exbiblio B.V. | Automatic modification of web pages |
TWI237771B (en) * | 2004-03-22 | 2005-08-11 | Via Tech Inc | Media player control system and control method used therein |
KR100539886B1 (en) | 2004-09-10 | 2005-12-28 | 삼성전자주식회사 | Digital broadcasting reception apparatus and method therefor |
KR100917886B1 (en) | 2005-10-11 | 2009-09-16 | 삼성전자주식회사 | Reproducing apparatus and reproducing method |
EP1934980A1 (en) * | 2005-10-11 | 2008-06-25 | Samsung Electronics Co., Ltd. | Reproducing method and apparatus to simultaneously reproduce a plurality of pieces of data |
KR100929073B1 (en) * | 2005-10-14 | 2009-11-30 | 삼성전자주식회사 | Apparatus and method for receiving multiple streams in portable broadcasting system |
KR100826192B1 (en) * | 2006-06-29 | 2008-04-30 | 엘지전자 주식회사 | apparatus for receiving broadcasting signal and method thereof |
JP2009060444A (en) * | 2007-08-31 | 2009-03-19 | Canon Inc | Image decoding apparatus and method, and recording device |
US20140056309A1 (en) * | 2010-12-01 | 2014-02-27 | Nokia Corporation | Method and apparatus for frame transfer using virtual buffer |
US20150109413A1 (en) * | 2013-10-21 | 2015-04-23 | Electronics And Telecommunications Research Institute | Video reception apparatus to provide hybrid service based on transport stream system target decoder model |
CN111106897B (en) * | 2018-10-26 | 2020-12-15 | 华为技术有限公司 | Decoding method and apparatus |
US11750706B1 (en) * | 2020-03-26 | 2023-09-05 | Amazon Technologies, Inc. | Data transmission time management |
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- 2001-07-10 AU AU54303/01A patent/AU771855B2/en not_active Ceased
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Also Published As
Publication number | Publication date |
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EP1182887A3 (en) | 2005-09-14 |
AU771855B2 (en) | 2004-04-01 |
CN1173512C (en) | 2004-10-27 |
KR100628619B1 (en) | 2006-09-26 |
AU5430301A (en) | 2002-01-17 |
KR20020005970A (en) | 2002-01-18 |
CN1333631A (en) | 2002-01-30 |
US20020003845A1 (en) | 2002-01-10 |
EP1182887A2 (en) | 2002-02-27 |
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